I've done the JMT and will be going again this summer. I went with the sportiva wildcats the first round but wouldn't do it again. I had the 1.0 version. See how on the shoe the front protection doesn't go around the edges very far at all? I guess the shoe is billed as more of a "race shoe", and so they cut a few corners for weight savings, like that. I shredded BOTH of my outside sides of my shoes beginning at the side toes and the tears ripped back and back. I wound up trying duct tape, sleeping pad glue and patches, and eventually sewing them with dental floss for half an hour each day. Granite can get sharp! Also completely possible I'm just clumsy. Also this was my fault as I bought a race shoe when I wanted a general use trail runner.
That said I'm going with La Sportiva Raptor's this year, which are meant to be a bit more rugged, and a bit more grippy as a bonus. I'm sure they don't vent quite as beautifully, but I love them so far. They're supposed to be based on the same footprint or some such.
One recommendation: Your feet get used to whatever you do with them. If you always wear boots, you'll need boots. So when you were saying your feet bruise with minimalist shoes I'd say you SHOULD wear them more often, so that your feet build up some strength and callous. The JMT will wear on your feet, so maybe to train try some more minimal shoes, even if you eventually put on a heavier pair for protection.